Thank you for installing Group-Office! We hope you will enjoy it. INSTALLATION To install Group-Office open a browser and go to the URL where you put the Group-Office files and follow instructions. Also have a look at: http://www.group-office.com/wiki/Installation_manual If you are using the Professional version you also need to install the free Ioncube loaders. Download them from: http://www.ioncube.com/loaders.php UPGRADE FROM VERSION 3.x AND HIGHER: To upgrade to 4.0 you must upgrade your previous version to at least 3.7.41 first. DEBIAN PACKAGES: Change your apt sources.list and change the Group-Office repository into: deb http://repos.groupoffice.eu/ fourzero main Then run: apt-get update apt-get dist-upgrade MANUAL UPGRADE: Then remove all the existing Group-Office scripts. Then upload the new sources. Do not copy the new files over the existing files! Then you can run the install script in /install Also read: http://www.group-office.com/wiki/Upgrading UPGRADING FROM VERSION 2.x: You can't upgrade from version 2.0 directly. Upgrade to 3.7 first. SYSTEM REQUIREMENTS -Linux, Mac OS X, Windows -PHP 5.3 or higher. -MySQL 5 or higher Good luck!